DMSO (dimethyl sulfoxide)
DMSO dimethyl sulfoxide is a sulfur-containing organic compound. It is a colorless and transparent liquid at room temperature. It is highly polar, highly hygroscopic, flammable, and highly Boiling point, aprotic and other properties. It is soluble in water, ethanol, acetone, ether and chloroform. It is a highly polar inert solvent. People call it the “universal solvent”. It is widely used as a solvent and reaction reagent. It has high selective extraction ability and can be used with trifluoride. Potassium borate is used as an extraction solvent for the separation of alkanes and aromatic hydrocarbons. It is used for the extraction of aromatic hydrocarbons and butadiene. It is especially used as a processing solvent and spinning solvent in acrylonitrile polymerization reactions, as a polyurethane synthesis and spinning solvent, and as a polyamide, Synthetic solvent for fluorochloroaniline, polyimide and polysulfone resins. In the pharmaceutical industry, dimethyl sulfoxide can also be directly used as the raw material and carrier of some drugs. In addition, DMSO itself has anti-inflammatory, analgesic, diuretic, chromium picolinate sedative and other effects. It is known as the “panacea” and is often used as an analgesic. The active ingredient of the drug is added to the drug. It can also be used as capacitor medium, antifreeze, brake oil, rare metal extractant, etc.
DMSO and dimethyl sulfoxide solvents for pesticides and agricultural fertilizers
DMSO is a solvent, penetrant and synergist for pesticides and agricultural fertilizers. Foreign reports have used antibiotics dissolved in DMSO to treat fruit tree rot, pesticides dissolved in DMSO to kill heart-eating insects in trees and fruits, and 05‰ solution sprayed during the flowering period of soybeans to increase yields by 10% to 15%. Various Adding 5‰DMSO to the fertilizer aqueous solution is more likely to cause human poisoning.
It has been used in the treatment of fruit tree mold diseases in China. In experiments on plants, non-penetrating drugs and dyes were formulated into DMSO aqueous solutions and applied to tree trunks. After 12 hours, it was found that the branches, leaves, roots and fruits were all contaminated or colored, and the test results disappeared after 24 hours. This shows that drugs and pigments dissolved in DMSO can penetrate and circulate, and can also be excreted through metabolism. This characteristic shows the application prospects of DMSO in agriculture and needs to be studied in the future.
DMSO and dimethyl sulfoxide antifreeze
The freezing point of pure DMSO is 18. 45℃, DMSO containing 40% water will not freeze at -60℃, and when DMSO is mixed with water and snow Give off heat. This property allows DMSO to be used as a component of automobile antifreeze, brake oil, and hydraulic fluid. Ethylene glycol antifreeze is no longer suitable when temperatures exceed -40°C.
